TetGen License--------------The software (TetGen) is licensed under the terms of the  MIT  licensewith the following exceptions:Distribution of  modified  versions  of this code is permissible UNDERTHE CONDITION THAT  THIS CODE AND ANY MODIFICATIONS  MADE TO IT IN THESAME SOURCE FILES  tetgen.h AND tetgen.cxx  REMAIN UNDER  COPYRIGHT OFTHE  ORIGINAL AUTHOR,  BOTH  SOURCE AND OBJECT  CODE  ARE MADE  FREELYAVAILABLE  WITHOUT   CHARGE,   AND  CLEAR   NOTICE  IS  GIVEN  OF  THE MODIFICATIONS.Distribution of this code for  any  commercial purpose  is permissibleONLY BY DIRECT ARRANGEMENT WITH THE COPYRIGHT OWNER.The full  license text is reproduced below.This means that TetGen is no free software, but for private, research,and  educational purposes it  can be  used at  absolutely no  cost andwithout further arrangements.For details, see http://tetgen.berlios.de==============================================================================TetGenA Quality Tetrahedral Mesh Generator and 3D Delaunay TriangulatorVersion 1.4 (Released on January 14, 2006).Copyright 2002, 2004, 2005, 2006 Hang SiRathausstr. 9, 10178 Berlin, Germanysi@wias-berlin.dePermission is hereby granted, free  of charge, to any person obtaininga  copy  of this  software  and  associated  documentation files  (the"Software"), to  deal in  the Software without  restriction, includingwithout limitation  the rights to  use, copy, modify,  merge, publish,distribute,  sublicense and/or  sell copies  of the  Software,  and topermit persons to whom the Software  is furnished to do so, subject tothe following conditions:Distribution of  modified  versions  of this code is permissible UNDERTHE CONDITION THAT  THIS CODE AND ANY MODIFICATIONS  MADE TO IT IN THESAME SOURCE FILES  tetgen.h AND tetgen.cxx  REMAIN UNDER  COPYRIGHT OFTHE  ORIGINAL AUTHOR,  BOTH  SOURCE AND OBJECT  CODE  ARE MADE  FREELYAVAILABLE  WITHOUT   CHARGE,   AND  CLEAR   NOTICE  IS  GIVEN  OF  THE MODIFICATIONS.Distribution of this code for  any  commercial purpose  is permissibleONLY BY DIRECT ARRANGEMENT WITH THE COPYRIGHT OWNER.The  above  copyright  notice  and  this permission  notice  shall  beincluded in all copies or substantial portions of the Software.THE  SOFTWARE IS  PROVIDED  "AS  IS", WITHOUT  WARRANTY  OF ANY  KIND,EXPRESS OR  IMPLIED, INCLUDING  BUT NOT LIMITED  TO THE  WARRANTIES OFMERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT  SHALL THE AUTHORS OR COPYRIGHT HOLDERS  BE LIABLE FOR ANYCLAIM, DAMAGES OR  OTHER LIABILITY, WHETHER IN AN  ACTION OF CONTRACT,TORT  OR OTHERWISE, ARISING  FROM, OUT  OF OR  IN CONNECTION  WITH THESOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.==============================================================================